Fixed #20238 -- Added threading support to LiveServerTestCase.

django/core/servers/basehttp.py

@@ -77,6 +77,11 @@ class WSGIServer(simple_server.WSGIServer):
             super().handle_error(request, client_address)
 
 
+class ThreadedWSGIServer(socketserver.ThreadingMixIn, WSGIServer):
+    """A threaded version of the WSGIServer"""
+    pass
+
+
 class ServerHandler(simple_server.ServerHandler):
     def handle_error(self):
         # Ignore broken pipe errors, otherwise pass on

django/test/testcases.py

@@ -21,7 +21,7 @@ from django.core.handlers.wsgi import WSGIHandler, get_path_info
 from django.core.management import call_command
 from django.core.management.color import no_style
 from django.core.management.sql import emit_post_migrate_signal
-from django.core.servers.basehttp import WSGIRequestHandler, WSGIServer
+from django.core.servers.basehttp import ThreadedWSGIServer, WSGIRequestHandler
 from django.db import DEFAULT_DB_ALIAS, connection, connections, transaction
 from django.forms.fields import CharField
 from django.http import QueryDict
@@ -1248,7 +1248,7 @@ class LiveServerThread(threading.Thread):
             connections.close_all()
 
     def _create_server(self, port):
-        return WSGIServer((self.host, port), QuietWSGIRequestHandler, allow_reuse_address=False)
+        return ThreadedWSGIServer((self.host, port), QuietWSGIRequestHandler, allow_reuse_address=False)
 
     def terminate(self):
         if hasattr(self, 'httpd'):

docs/releases/2.0.txt

@@ -193,7 +193,7 @@ Templates
 Tests
 ~~~~~
 
-* ...
+* Added threading support to :class:`~django.test.LiveServerTestCase`.
 
 URLs
 ~~~~

tests/servers/tests.py

@@ -130,3 +130,19 @@ class LiveServerPort(LiveServerBase):
         finally:
             if hasattr(TestCase, 'server_thread'):
                 TestCase.server_thread.terminate()
+
+
+class LiverServerThreadedTests(LiveServerBase):
+    """If LiverServerTestCase isn't threaded, these tests will hang."""
+
+    def test_view_calls_subview(self):
+        url = '/subview_calling_view/?%s' % urlencode({'url': self.live_server_url})
+        with self.urlopen(url) as f:
+            self.assertEqual(f.read(), b'subview calling view: subview')
+
+    def test_check_model_instance_from_subview(self):
+        url = '/check_model_instance_from_subview/?%s' % urlencode({
+            'url': self.live_server_url,
+        })
+        with self.urlopen(url) as f:
+            self.assertIn(b'emily', f.read())

tests/servers/urls.py

@@ -7,4 +7,7 @@ urlpatterns = [
     url(r'^model_view/$', views.model_view),
     url(r'^create_model_instance/$', views.create_model_instance),
     url(r'^environ_view/$', views.environ_view),
+    url(r'^subview_calling_view/$', views.subview_calling_view),
+    url(r'^subview/$', views.subview),
+    url(r'^check_model_instance_from_subview/$', views.check_model_instance_from_subview),
 ]

tests/servers/views.py

@@ -1,3 +1,5 @@
+from urllib.request import urlopen
+
 from django.http import HttpResponse
 
 from .models import Person
@@ -20,3 +22,18 @@ def create_model_instance(request):
 
 def environ_view(request):
     return HttpResponse("\n".join("%s: %r" % (k, v) for k, v in request.environ.items()))
+
+
+def subview(request):
+    return HttpResponse('subview')
+
+
+def subview_calling_view(request):
+    response = urlopen(request.GET['url'] + '/subview/')
+    return HttpResponse('subview calling view: {}'.format(response.read().decode()))
+
+
+def check_model_instance_from_subview(request):
+    urlopen(request.GET['url'] + '/create_model_instance/')
+    response = urlopen(request.GET['url'] + '/model_view/')
+    return HttpResponse('subview calling view: {}'.format(response.read().decode()))